Cory Monteith Autopsy Scheduled For Monday (VIDEO, TWITTER REACTS)

VANCOUVER - Richard Monteith struggled to hold back his sobs on Sunday as he laid down a bouquet of white flowers outside the Vancouver hotel where his cousin and "Glee" actor Cory Monteith died the previous day.

Squatting with his head in his hands, Richard's shoulders shook as he wiped away his tears before he carefully tucked a card into his bouquet. His flowers sat next to another bouquet and a stuffed animal — tributes to the Canadian actor who Vancouver police confirmed died on Saturday.

Richard said little, only mentioning that he and Monteith were "decently close," and the two had last seen each other in Vancouver in April.

Monteith, who played the role of football player and singer Finn Hudson on the popular television series "Glee", was found dead in his room at the Fairmont Pacific Rim hotel on Saturday afternoon.

Police said the cause of death still must be determined, but investigators do not believe foul play was involved.

Tributes from celebrities and fans of "Glee" poured in on Sunday as those who admire Monteith learned of his sudden death.

Outside the downtown Vancouver hotel, 16-year-old Helen Slater placed a stuffed moose as well as a note for Monteith.

Slater, who is visiting Vancouver from England, said she was shocked to hear the news of Monteith's death. She called him "a complete goofball" and a "positive influence," and decided a stuffed moose was a fitting tribute because Monteith was Canadian, and had been seen before in photos wearing moose antlers.

"The note says how he was a part of 'Glee,' and how that's kind of changed my life," Slater said, tearing up. "Nothing's going to be the same anymore. It just put me (through) some really tough times, and helped me through depression a lot."

Chanthi Vijayapala, who lives in Burnaby, B.C., said she used to follow the TV show "religiously," but stopped after the first few seasons. However, the 19-year-old said her heart sank when she heard the news.

"As a person, [Monteith] was just so genuine and authentic, he was the kindest person ever," she said. "Even when I started falling out of 'Glee,' I still followed him as a person and actor. He just seemed so awesome."

Gerry Susca from Brampton, Ont., expects the popular show will have a hard time adjusting without Monteith.

"I don't know how they're going to put this into the show," he said. "I think they should do something like...maybe a memorial or something."

Fellow celebrities and "Glee" cast members took to Twitter to express their condolences.

Dot-Marie Jones, who plays Coach Shannon Beiste, wrote, "I am blessed to have worked with him and love him so much. My heart is with his family and our whole Glee family. I love you all."

And Lauren Potter, who plays cheerleader Becky Jackson said, "I am totally heartbroken right now. I love Cory so much this hurts my heart. I hope my Glee family is OK right now. I love them all. Cory was always so nice to me. I have so many good memories."

"We ask that everyone kindly respect Lea's privacy during this devastating time," said Michele's representative Molly Kawachi in a written statement.

The executive producers of Glee and Fox also issued a statement on Saturday night, saying, "We are deeply saddened by this tragic news. Cory was an exceptional talent and an even more exceptional person. He was a true joy to work with and we will all miss him tremendously. Our thoughts and prayers are with his family and loved ones."

Acting Vancouver Police Chief Doug LePard told reporters on Saturday that Monteith's body was found around noon after he failed to check out from his room as scheduled.

LePard said the actor had been with some other people in the room the night before, but video and electronic records show that Monteith entered the room by himself on Saturday morning.

His death comes several months after he told People magazine that he had admitted himself into rehab for substance abuse, but police declined to speculate whether there was any connection.

Monteith, who had been open about having suffered from drug addiction before, and about having received treatment when he was 19, was born in Calgary and raised in Victoria, where his mother still lives.

He recently shot a Canadian film called "All the Wrong Reasons," slated to come out later this year with actors Kevin Zegers, Karine Vanasse and Emily Hampshire.

He had minor roles in other films before joining the cast of "Glee," which debuted in 2009.

Before becoming an actor, Monteith worked as a Wal-Mart people greeter in Nanaimo, B.C., as well as a taxicab driver, school bus driver, and roofer.

He also played drummer for the California-based band Bonnie Dune, and was an avid supporter of the Project Limelight Society, a Vancouver charity that offers a theatre program to at-risk youth.

Just days before his death, Monteith dined with casting director and Project Limelight co-founder Maureen Webb, as well as with Elena Kirschner from a local talent agency in an east Vancouver restaurant, according to tweets posted by the three parties.

BC Coroners Service spokesperson Barb McLintock said an autopsy may be conducted early next week — possibly as early as Monday — once staff have gathered enough information about Monteith's health history.